Johnson, 22, had an impressive showing at his pro day in May. He ran a 4.47-second 40-yard dash with a 6.60-second three-cone drill and 4.20-second short shuttle with a 10-foot-2 broad jump and 33-inch vertical leap.

The 5-foot-10, 186-pound receiver caught 60 passes for 608 yards with two touchdowns as a senior in 2013 with the Black Bears.